CN105741925A - Double-sided conducting metal foil film belt and cable employing same - Google Patents
Double-sided conducting metal foil film belt and cable employing same Download PDFInfo
- Publication number
- CN105741925A CN105741925A CN201610023505.9A CN201610023505A CN105741925A CN 105741925 A CN105741925 A CN 105741925A CN 201610023505 A CN201610023505 A CN 201610023505A CN 105741925 A CN105741925 A CN 105741925A
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- Prior art keywords
- metal forming
- double
- layer
- metal foil
- film strips
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Insulated Conductors (AREA)
Abstract
The invention relates to the technical field of cable shielded transmission, and especially relates to a double-sided conducting metal foil film belt used in the shielding layer of a data transmission line. A substrate is folded in the film layer direction to form an upper metal foil film layer and a lower metal foil film layer, and the upper metal foil film layer and the lower metal foil film layer are fixedly connected as a whole. Compared with the existing single-sided or double-sided non-conducting metal foil film belt, by using the double-sided conducting metal foil film belt to coat a core wire, the core wire can be completely shielded by metal, and the high-frequency shielding effect is better; and meanwhile, the double-sided conducting metal foil film belt is of higher toughness and is more applicable to cables with small diameter, the EMI and VSWR (Standing Wave Ratio) are improved, the bandwidth is extended, and the stability of product performance is improved. As the manufacturing process of the double-sided conducting metal foil film belt is simpler than that of the existing double-sided conducting metal foil film belt, the consumption of metal resources on a cable of unit length is reduced, and the production cost is reduced. The invention further provides a cable employing the double-sided conducting metal foil film belt.
Description
Technical field
The present invention relates to the technical field of cable shielding, transmission, particularly a kind of double-side conduction metal forming film strips of data signal transmission wire screen layer, and adopt the cable of this double-side conduction metal forming film strips.
Background technology
When transportation line cable, for improving anti-EMI filter performance, it is generally required to arrange screen layer, for the realization of the performances such as loop composition and electromagnetic shielding.
For coaxial cable, existing coaxial cable generally comprises center conductor and screen layer, is filled with dielectric between conductor and screen layer, and screen layer is wrapped with restrictive coating.
nullScreen layer form is common for band、Braiding、It is wound around、The combination of corrugated tube or these several forms，And modal a kind of band screen layer form is metallo-plastic composite wrapping tape，Wherein aluminum foil mylar belt shielding is most commonly seen，It is widely used，Apply for aluminum foil mylar belt as external shielding layer: aluminum foil mylar belt is to be drawn be bonded by one layer of aluminium foil and a strata ester film PET wheat，When cladding core wire insulating surface，One side aluminum foil mylar belt is due to the existence of PET，Its aluminium lamination can not contact with each other，Cause the complete physical Guan Bi that cannot form metal level aluminum，And PET medium provides only intensity，Cannot intercept or reflection electromagnetic wave，So discontinuous due to metal level，Cause that the result of this structure is that electromagnetic wave is easily revealed from PET medium、External electromagnetic waves also easily enters inside coaxial line，EMI poor-performing，Affect in signal transmission cable and the long range propagation of signal is realized.For this, for making shielding close to improve anti-EMI filter performance, on high-frequency signal transmission wire, people also have employing double-sided aluminum foil band to shield.
Common double-sided aluminum foil band is to be sequentially overlapped formed by one layer of aluminium foil, one layer of PET and another layer of aluminium foil, or for promoting shield effectiveness, make to turn between two-layer aluminium foil, also the way having is uniformly to punch on pet layer, then electroplates again, makes to plate on the hole of pet layer conductive layer, so that upper and lower two-layer aluminium foil mutual conduction, although adopting this double-sided aluminum foil band to improve the performance of shielding, but owing to the production technology of existing double-sided aluminum foil band is more complicated, production cost is high.
More traditional band screen layer solution is to adopt pure metal layer, such as pure copper strips, fine aluminium band, silver-plated copper strips, copper covered steel or copper clad aluminum strip etc., this type of simple metal band is due to excellent electrical conductivity, the static cable of realization has significant effectiveness, but this solution is not but suitable for dynamic application in practical application, also the occasion needing cable generation deformation that inapplicable wiring is complicated, it is also not suitable for the cable processing of high length, such as consumer electronics line, differential pair (SFP, QSFP, SFP+, MINISAS etc.), medical treatment line, robot line, automotive line, netting twine, Optical Fiber Composite cable etc..The tortuous deformation in production and processing of this kind of cable can cause simple metal foil to produce deformation, and the Deformation Features of simple metal is cannot to restore after deformation, namely cable is once after unwinding and rewinding, bending process, namely gap is formed, and gap continues on through and is continually changing by deformation and spreads, cause the continuous variation of cable structure, in dynamic machining and application process, it is impossible to realize concordance and the stationarity of properties of product.And the metal of shielding layer structure keeps physics continuous whole, it is produce and work process realizes high-speed cable well to shield the sufficient and necessary condition with electric property.
In sum, in the data transmission cable requiring softness, resistance to bending, especially high-speed cable, traditional single-side metal foil wheat is drawn, the two-sided combination being not turned on metal forming compound wheat drawstring, braiding, winding and these methods uses, and all the physics because accomplishing screen layer path is continuous whole.When causing cable transmission frequency to raise, data transmission quality declines, it is difficult to obtain higher bandwidth and transfer rate.
Summary of the invention
The present invention is to solve:
1, the complex manufacturing of flexible double-sided metallic foil, problem that production cost is high；
2, simple metal foil rigidity is strong, nonelastic, cannot restore, including corrugated tube, be only applicable to the wiring in static application place after deformation, it is impossible to be applicable to require the resistance to bending of cable, soft problem；
And a kind of double-side conduction metal forming film strips provided.
For reaching above-mentioned functions, present invention provide the technical scheme that
A kind of double-side conduction metal forming film strips, including base material, described base material is disposed with thin layer and metal forming rete, and described base material is folded to form upper metal forming rete and lower metal forming rete, described upper metal forming rete and described lower metal forming rete and is fixedly connected into one to described thin layer direction.
Preferably, the width of described upper metal forming rete is the 10%～99% of described lower metal foil film slice width degree.
Preferably, the width of described upper metal forming rete is equal with the width of described lower metal forming rete.
Preferably, described upper metal forming rete and described lower metal forming rete adopt glue glued or hot-melt adhesive paste.
Preferably, after the bending of described lower metal forming rete, the film surface beyond the thin layer of described upper metal foil film layer segment arranges hot melt adhesive layer, and the PUR tack temperature of described hot melt adhesive layer is between 60 DEG C to 300 DEG C.
Preferably, in described metal forming rete, metal foil layer refers to aluminium foil layer, one or more combinations in native silver layer or copper foil layer；In metal forming rete, metallic diaphragm is by vacuum evaporation coating, magnetron sputtering, chemical vapour deposition (CVD), ion implanting plating and one or more acquisitions in ion assisted deposition.
Preferably, outer silver-plated, the nickel plating of described metal forming rete, tin plating or three combine.
Preferably, described thin layer adopts lengthwise dimensional stability thin film, and when dimensional stability thin film refers to 200mm/min draw speed, elongation at break is less than 100%.
Preferably, described lengthwise dimensional stability thin film is polyethylene terephtalate, PEN PEN, polypropylene PP, polyimides PI, polyether-ether-ketone PEEK or polytetrafluoroethylene PTFE.
The present invention additionally provides a kind of cable simultaneously, and including the heart yearn set gradually from inside to outside, screen layer and restrictive coating, described screen layer is formed by above-mentioned double-side conduction metal forming film strips cladding.
Preferably, described double-side conduction metal forming film strips is coated on single-core line or split conductor, and the metal forming film strips Duplication of cladding is between 0%～90%.
Preferably, the wrapped combination cable in single-core line, many single-core lines, single-core line and split conductor of described double-side conduction metal forming film strips or cable heart yearn mixture, constitute outer conductor or screen layer, wrapped metallic foil Duplication is between 5%～90%
Preferably, described double-side conduction metal forming film strips indulges the combination cable or cable heart yearn mixture that are wrapped in single-core line, many single-core lines, single-core line and split conductor, constitutes outer conductor or screen layer, and the metallic foil Duplication of vertical bag is between 0%～60%.
The beneficial effects of the present invention is:
The interference of heart yearn can be realized shielding completely by the double-side conduction metallic foil 1, adopting the present invention when heart yearn is coated with, and shield effectiveness is good；
2, adopt the double-side conduction metal forming film strips of the present invention after heart yearn is coated with, when electromagnetic wave transmits in cable, electromagnetic wave passes ripple in the airtight cavity that this metallic foil is formed, it is not likely to produce electromagnetic leakage, thus the cable of ratio employing one-sided metallic foil can provide higher frequency range, reduce the distortion of data signal, strengthen EMI effect, improve the stability of properties of product；
3, compared with simple metal foil is compared, due to the fact that the non-metallic film of middle employing, have than simple metal foil toughness more preferably and buckle resistance, therefore the cable that diameter is little it is applicable to, particularly require the cable of tolerance bending process and application, especially 10AWG is with rule of reaching the standard grade, and specifically applies such as the holding wire of robotic transfer's signal, parallel differential pair (SFP, QSFP, MINISAS), the coaxial outer conductor of USB3.1, micro coaxle MCC etc.；
4, due to simple than existing double-sided metal foil of the manufacturing process of the present invention, production cost is low, compares simple metal foil, can effectively reduce the metals resources consumption of unit length cable.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment one；
Fig. 2 is the structural representation of embodiment two；
Fig. 3 is the structural representation of embodiment three；
Fig. 4 is the cable structure schematic diagram of embodiment four；
Fig. 5 is the structural representation of cable.
Detailed description of the invention
Below in conjunction with accompanying drawing 1 to accompanying drawing 5, the present invention is further elaborated:
Embodiment one:
A kind of double-side conduction metallic foil as shown in Figure 1, including base material 1, base material 1 is disposed with thin layer 11 and metal forming rete 12, thin layer 11 adopts lengthwise dimensional stability thin film, such as polyethylene terephtalate, PEN PEN, polypropylene PP, polyimides PI, polyether-ether-ketone PEEK or polytetrafluoroethylene PTFE, in the present embodiment, thin layer 11 adopts polyethylene terephtalate, and in metal forming rete 12, metal foil layer is to adopt aluminium foil layer；In metal forming rete 12, metallic diaphragm is obtained by vacuum evaporation coating.Base material 1 is folded to form upper metal foil layer 21 and lower metal foil layer 22 to thin layer 11 direction, in the present embodiment, adopts the mode of doubling, and after namely folding, the width of upper metal foil layer 21 and lower metal foil layer 22 is equal.Gluedd joint by hot melt adhesive layer 3 between upper metal foil layer 21 and lower metal foil layer 22, so that the upper and lower surface of the present invention is all aluminium foil surface.Can pass through between metal foil layer 21 and lower metal foil layer 22 in the process of actual production that other the mode such as hot-melt binding or ultra-sonic welded is fixing to be connected.
In the present embodiment, aluminium foil surface being provided with functional skin layer, functional skin layer correspondingly can select according to the purposes of product, and top layer is generally adopted silver, nickel or stannum.Electric conductivity can be improved in silver top layer, is mainly used in hyperfrequency, such as coaxial line and the differential pair of more than 5G transmission speed；Nickel coating can improve low frequency performance；Nickel tin layers can improve the oxygen-proof property of double-side conduction metallic foil, and makes its welding performance of raising.
Embodiment two:
In the present embodiment, as in figure 2 it is shown, the width of upper metal foil layer 21 is the 30% of the width of lower metal foil layer 22, certainly, the width of upper metal foil layer 21 can select as required, in general go up metal foil layer 21 the width that width is lower metal foil layer 22 10%～100%.Thin layer 11 adopts polytetrafluoroethylene PTFE, and in metal forming rete 12, metal foil layer is copper foil layer, and metallic diaphragm adopts magnetron sputtering or ion plating to obtain.Other condition is identical with embodiment one.Additionally, as shown in Figure 4, in use, when being wound into heart yearn for convenience, can cling between metallic foil, after the bending of lower metal forming rete 22, the film surface beyond the thin layer 11 of upper metal forming rete 21 part arranges hot melt adhesive layer 3, and in the process used, the PUR tack temperature that hot melt adhesive layer 3 adopts is preferred between 60 DEG C to 300 DEG C.
In employing, metal foil layer 21 is determined its directivity when mainly heart yearn being wound around than the mode of the narrow width of lower metal foil layer 22, and in some occasion, when transmitting the heart yearn of high-frequency line such as parcel, if regardless of directivity, the performance after winding is variant.Additionally when multicore heart yearn is stranded, the path that electric charge is walked is different, can cause the characteristic of " delay ".
Additionally adopting two-sided is all the relatively costly of all-metal face, and high-frequency line has kelvin effect, therefore, when realizing said function, in employing, metal foil layer 21 can reduce the use of Copper Foil than the mode of the width constriction of lower metal foil layer 22, thus advantageously reducing production cost.
Embodiment three:
In the present embodiment, as it is shown on figure 3, the direction of the lower metal foil layer 22 part upwards metal foil layer 21 that exceedes metal foil layer 21 folds and fit on metal foil layer 21, the mode of excess enthalpy doubling is namely adopted.Thin layer 11 adopts PP layer, the metal foil layer in metal forming rete 12 to be native silver layer, and metallic diaphragm adopts ion plating to obtain, and other condition is identical with embodiment one.It addition, metal foil layer and metallic diaphragm can be used alone or stacking compound is constituted, metal foil layer can be aluminium foil layer, one or more combinations in native silver layer or copper foil layer；Can be through vacuum evaporation coating, magnetron sputtering, ion implanting plating and one or more acquisitions in auxiliary plating, chemical vapour deposition (CVD).
Adopt the mode of excess enthalpy doubling or the mode of multilayer coating structure, the shielding properties of product can be improved further.
Embodiment four:
The present embodiment is a kind of cable, as it is shown in figure 5, include the heart yearn 4, screen layer 5 and the restrictive coating 6 that set gradually from inside to outside, screen layer 5 is formed by above-mentioned double-side conduction metal forming film strips cladding.
Heart yearn 4 is single-core line or split conductor, and the metallic foil Duplication of cladding is between 0%～90%.
It addition, double-side conduction metallic foil can also adopt wrapped mode, around being wrapped in many single-core lines or single-core line assembly, constituting outer conductor or screen layer 5, wrapped metallic foil Duplication is between 5%～90%；Or, double-side conduction metallic foil can also adopt the mode of vertical bag, the vertical combination cable being wrapped in single-core line, split conductor or single-core line and split conductor, constitutes outer conductor or screen layer 5, and the metallic foil Duplication of vertical bag is between 1%～60%.
Embodiment described above, the simply preferred embodiments of the present invention, it is not the practical range limiting the present invention, therefore all equivalences done according to the structure described in the present patent application the scope of the claims, feature and principle change or modify, and all should be included within the scope of present patent application.
Claims (13)
1. a double-side conduction metal forming film strips, including base material, described base material is disposed with thin layer and metal forming rete, it is characterized in that: described base material is folded to form upper metal forming rete and lower metal forming rete, described upper metal forming rete and described lower metal forming rete by metal forming rete to described thin layer direction and is fixedly connected into one.
2. double-side conduction metal forming film strips as claimed in claim 1, it is characterised in that: the width of described upper metal forming rete is the 10%～99% of described lower metal foil film slice width degree.
3. double-side conduction metal forming film strips as claimed in claim 1, it is characterised in that: the width of described upper metal forming rete is equal with the width of described lower metal forming rete.
4. double-side conduction metal forming film strips as claimed in claim 1, it is characterised in that: described upper metal forming rete and described lower metal forming rete adopt glue glued or hot-melt adhesive paste.
5. double-side conduction metal forming film strips as claimed in claim 2, it is characterized in that: after the bending of described lower metal forming rete, the film surface beyond the thin layer of described upper metal foil film layer segment arranges hot melt adhesive layer, and the PUR tack temperature of described hot melt adhesive layer is between 60 DEG C to 300 DEG C.
6. the double-side conduction metal forming film strips as described in claim 1 to 5 any one, it is characterised in that: in described metal forming rete, metal foil layer refers to aluminium foil layer, one or more combinations in native silver layer or copper foil layer；In metal forming rete, metallic diaphragm is by vacuum evaporation coating, magnetron sputtering, chemical vapour deposition (CVD), ion implanting plating and one or more acquisitions in ion assisted deposition.
7. double-side conduction metal forming film strips as claimed in claim 6, it is characterised in that: outer silver-plated, the nickel plating of described metal forming rete, tin plating or three combine.
8. the double-side conduction metal forming film strips as described in claim 1 to 5 any one, described thin layer adopts lengthwise dimensional stability thin film.
9. double-side conduction metal forming film strips as claimed in claim 8, it is characterised in that: described lengthwise dimensional stability thin film is polyethylene terephtalate, PEN PEN, polypropylene PP, polyimides PI, polyether-ether-ketone PEEK or polytetrafluoroethylene PTFE.
10. a cable, including the heart yearn set gradually from inside to outside, screen layer and restrictive coating, it is characterised in that: described screen layer double-side conduction metal forming film strips cladding described in claim 1,2,3,4,5,7 or 9 forms.
11. cable as claimed in claim 10, it is characterised in that: described double-side conduction metal forming film strips is coated on single-core line or split conductor, and the metal forming film strips Duplication of cladding is between 0%～90%.
12. the cable as described in claim 10 or 11, it is characterised in that: described double-side conduction metal forming film strips is wrapped in many single-core lines or single-core line assembly, constitutes outer conductor or screen layer, and wrapped metal forming film strips Duplication is between 5%～90%.
13. the cable as described in claim 10 or 11, it is characterized in that: described double-side conduction metal forming film strips indulges the combination cable being wrapped in single-core line, split conductor or single-core line and split conductor, constituting outer conductor or screen layer, the metal forming film strips Duplication of vertical bag is between 1%～60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610023505.9A CN105741925A (en) | 2016-01-14 | 2016-01-14 | Double-sided conducting metal foil film belt and cable employing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610023505.9A CN105741925A (en) | 2016-01-14 | 2016-01-14 | Double-sided conducting metal foil film belt and cable employing same |
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| Publication Number | Publication Date |
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| CN105741925A true CN105741925A (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610023505.9A Pending CN105741925A (en) | 2016-01-14 | 2016-01-14 | Double-sided conducting metal foil film belt and cable employing same |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105788707A (en) * | 2016-03-09 | 2016-07-20 | 虞家桢 | Copper plastic composite belt and fabrication method thereof |
| CN106710690A (en) * | 2016-12-26 | 2017-05-24 | 南昌联能科技有限公司 | Electromagnetic shielding film for cables, manufacturing method of electromagnetic shielding film and manufacturing method of cables |
| CN109996430A (en) * | 2019-04-16 | 2019-07-09 | 东莞市蓝姆材料科技有限公司 | High flexible metal foil production method and a kind of high flexible metal foil are connected entirely |
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| CN204131912U (en) * | 2014-08-30 | 2015-01-28 | 惠州市东铭电工材料有限公司 | A kind of aluminium foil composite material shielding tape |
| CN205542033U (en) * | 2016-01-14 | 2016-08-31 | 东莞市蓝姆材料科技有限公司 | Two -sided cable that switches on metal forming pellicular zone and use it |
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| CN1544246A (en) * | 2003-11-11 | 2004-11-10 | 李永安 | Electromagnetic interference proof shielding composite membrane and compounding method thereof |
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Application publication date: 20160706 |